package com.mmall.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.google.common.collect.Lists;
import com.mmall.common.Const;
import com.mmall.common.ResponseCode;
import com.mmall.common.ServerResponse;
import com.mmall.dao.CategoryMapper;
import com.mmall.dao.ProductMapper;
import com.mmall.pojo.Category;
import com.mmall.pojo.Product;
import com.mmall.service.ICategoryService;
import com.mmall.service.IProductService;
import com.mmall.util.DateTimeUtil;
import com.mmall.util.PropertiesUtil;
import com.mmall.vo.ProductDetailVo;
import com.mmall.vo.ProductListVo;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

@Service("iProductService")
public class ProductServiceImpl implements IProductService {

    @Autowired
    private ProductMapper productMapper;

    @Autowired
    private CategoryMapper categoryMapper;

    @Autowired
    private ICategoryService iCategoryService;

    @Override
    public ServerResponse saveOrUpdateProduct(Product product) {
        if(product != null){
            if(StringUtils.isNotBlank(product.getSubImages())){
                String[] subImageArray = product.getSubImages().split(",");
                if(subImageArray.length > 0){
                    product.setMainImage(subImageArray[0]);
                }
            }

            if(product.getId() != null){
                int rowCount = productMapper.updateByPrimaryKey(product);
                if(rowCount > 0){
                    return ServerResponse.createBySuccessMessage("更新产品成功");
                }
                return ServerResponse.createBySuccessMessage("更新产品失败");
            }else {
                int rowCount = productMapper.insert(product);
                if(rowCount > 0){
                    return ServerResponse.createBySuccessMessage("新增产品成功");
                }else{
                    return ServerResponse.createBySuccessMessage("新增产品失败");
                }
            }
        }

        return ServerResponse.createByErrorMessage("参数不正确[Product]");
    }

    @Override
    public ServerResponse<String> setSaleStatus(Integer productId, Integer status) {
        if(productId == null || status == null){
            return ServerResponse.createByErrorCodeMessage(ResponseCode.ILLEGAL_ARGUMENT.getCode(),
                    ResponseCode.ILLEGAL_ARGUMENT.getDesc());
        }
        Product product = new Product();
        product.setId(productId);
        product.setStatus(status);
        int rowCount = productMapper.updateByPrimaryKeySelective(product);
        if(rowCount > 0){
            return ServerResponse.createBySuccessMessage("修改产品销售状态成功");
        }
        return ServerResponse.createByErrorMessage("修改产品销售状态失败");
    }

    @Override
    public ServerResponse<ProductDetailVo> manageProductDetail(Integer productId) {
        if(productId == null){
            return ServerResponse.createByErrorCodeMessage(ResponseCode.ILLEGAL_ARGUMENT.getCode(),
                    ResponseCode.ILLEGAL_ARGUMENT.getDesc());
        }
        Product product = productMapper.selectByPrimaryKey(productId);
        if(product == null){
            return ServerResponse.createByErrorMessage("产品已下架或删除");
        }
        // [√] vo(value object)
        // pojo -> bo(business object) -> vo(view object)
        ProductDetailVo productDetailVo = assembleProductDetailVo(product);
        return ServerResponse.createBySuccess(productDetailVo);
    }

    @Override
    public ServerResponse<PageInfo> getProductList(int pageNum, int pageSize) {
        // startPage
        PageHelper.startPage(pageNum,pageSize);
        // 填充自己的sql查询逻辑
        List<Product> productList = productMapper.selectList();

        List<ProductListVo> productListVoList = Lists.newArrayList();
        for(Product productItem : productList){
            ProductListVo productListVo = assembleProductListVo(productItem);
            productListVoList.add(productListVo);
        }
        // pageHelper 收尾
        PageInfo pageResult = new PageInfo(productList);
        pageResult.setList(productListVoList);

        return ServerResponse.createBySuccess(pageResult);
    }

    @Override
    public ServerResponse<PageInfo> searchProduct(String productName, Integer productId, int pageNum, int pageSize) {
        PageHelper.startPage(pageNum,pageSize);
        if(StringUtils.isNotBlank(productName)){
            productName = new StringBuilder()
                    .append("%").append(productName).append("%")
                    .toString();
        }
        List<Product> productList = productMapper.selectByNameAndProductId(productName,productId);

        List<ProductListVo> productListVoList = Lists.newArrayList();
        for(Product productItem : productList){
            ProductListVo productListVo = assembleProductListVo(productItem);
            productListVoList.add(productListVo);
        }

        PageInfo pageResult = new PageInfo(productList);
        pageResult.setList(productListVoList);

        return ServerResponse.createBySuccess(pageResult);
    }

    @Override
    public ServerResponse<ProductDetailVo> getProductDetail(Integer productId) {

        if(productId == null){
            return ServerResponse.createByErrorCodeMessage(ResponseCode.ILLEGAL_ARGUMENT.getCode(),
                    ResponseCode.ILLEGAL_ARGUMENT.getDesc());
        }
        Product product = productMapper.selectByPrimaryKey(productId);
        if(product == null){
            return ServerResponse.createByErrorMessage("产品已下架或删除");
        }
        // [√] vo(value object)
        // pojo -> bo(business object) -> vo(view object)
        if(product.getStatus() != Const.ProductStatus.ON_SALE.getCode()){
            return ServerResponse.createByErrorMessage("产品已下架或删除");
        }
        ProductDetailVo productDetailVo = assembleProductDetailVo(product);
        return ServerResponse.createBySuccess(productDetailVo);

    }

    @Override
    public ServerResponse<PageInfo> getProductByKeywordCategory(String keyword, Integer categoryId,
                                                                int pageNum, int pageSize,String orderBy) {
        if(StringUtils.isBlank(keyword) && categoryId == null){
            return ServerResponse.createByErrorCodeMessage(ResponseCode.ILLEGAL_ARGUMENT.getCode(),
                    ResponseCode.ILLEGAL_ARGUMENT.getDesc());
        }

        List<Integer> categoryIdList = new ArrayList<>();

        if(categoryId != null){
            Category category = categoryMapper.selectByPrimaryKey(categoryId);
            if(category == null && StringUtils.isBlank(keyword)){
                // 没有该分类,没有关键字,返回一个空结果集,不报错
                PageHelper.startPage(pageNum,pageSize);
                List<ProductListVo> productListVoList = Lists.newArrayList();
                PageInfo pageInfo = new PageInfo(productListVoList);
                return ServerResponse.createBySuccess(pageInfo);
            }

            categoryIdList = iCategoryService
                    .selectCategoryAndChildrenById(category.getId()).getData();
        }
        if(StringUtils.isNotBlank(keyword)){
            keyword = new StringBuilder()
                    .append("%").append(keyword).append("%").toString();
        }

        PageHelper.startPage(pageNum,pageSize);

        // 排序处理
        if(StringUtils.isNotBlank(orderBy)){
            if(Const.ProductListOrderBy.PRICE_ASC_DESC.contains(orderBy)){
                String[] orderByArray = orderBy.split("_");
                PageHelper.orderBy(orderByArray[0] + " " + orderByArray[1]);
            }
        }

        List<Product> productList = productMapper.selectByNameAndCategoryIds(StringUtils.isBlank(keyword) ? null : keyword,
                categoryIdList.size()==0 ? null : categoryIdList);
        List<ProductListVo> productListVoList = Lists.newArrayList();
        for(Product productItem : productList){
            ProductListVo productListVo = assembleProductListVo(productItem);
            productListVoList.add(productListVo);
        }

        PageInfo pageInfo = new PageInfo(productList);
        pageInfo.setList(productListVoList);

        return ServerResponse.createBySuccess(pageInfo);
    }

    private ProductDetailVo assembleProductDetailVo(Product product){
        ProductDetailVo productDetailVo = new ProductDetailVo();
        productDetailVo.setId(product.getId());
        productDetailVo.setSubtitle(product.getSubtitle());
        productDetailVo.setPrice(product.getPrice());
        productDetailVo.setMainImage(product.getMainImage());
        productDetailVo.setSubImages(product.getSubImages());
        productDetailVo.setCategoryId(product.getCategoryId());
        productDetailVo.setDetail(product.getDetail());
        productDetailVo.setName(product.getName());
        productDetailVo.setStatus(product.getStatus());
        productDetailVo.setStock(product.getStock());

        // imageHost
        productDetailVo.setImageHost(PropertiesUtil.getProperty("ftp.server.http.prefix",
                "http://img.happymmall.com/"));

        // parentCategoryId
        Category category = categoryMapper.selectByPrimaryKey(product.getCategoryId());
        if(category == null){ // TODO: 这是什么逻辑?
            productDetailVo.setParentCategoryId(0);
        }else{
            productDetailVo.setParentCategoryId(category.getParentId());
        }

        // createTime
        // updateTime
        productDetailVo.setCreateTime(DateTimeUtil.dateToStr(product.getCreateTime()));
        productDetailVo.setUpdateTime(DateTimeUtil.dateToStr(product.getUpdateTime()));
        return productDetailVo;
    }

    /**
     *
     private Integer id;

     private Integer categoryId;

     private String name;

     private String subtitle;

     private String mainImage;

     private BigDecimal price;

     private Integer status;

     private String imageHost;
     * @param product
     * @return
     */
    private ProductListVo assembleProductListVo(Product product){
        ProductListVo productListVo = new ProductListVo();
        productListVo.setId(product.getId());
        productListVo.setCategoryId(product.getCategoryId());
        productListVo.setName(product.getName());
        productListVo.setSubtitle(product.getSubtitle());
        productListVo.setMainImage(product.getMainImage());
        productListVo.setPrice(product.getPrice());
        productListVo.setStatus(product.getStatus());
        productListVo.setImageHost(PropertiesUtil.getProperty("ftp.server.http.prefix",
                "http://img.happymmall.com/"));
        return productListVo;
    }
}
